buying cometics, need to know bore size??

leathal injection · 07-24-2005, 07:23 PM

hey guys, i have a 308, and i want to buy cometic head gaskets. What size bore do i have? cause i know there gonna ask when i call to order them???

thanks alot guys

HotRoddin · 07-25-2005, 02:51 AM

Quote:

Originally Posted by leathal injection

hey guys, i have a 308, and i want to buy cometic head gaskets. What size bore do i have? cause i know there gonna ask when i call to order them???

thanks alot guys

Either i'm reading this wrong or this is a strange post?

Your bore is listed in your signature ? Except i'm fairly sure you mean it's bored .040 not .40 ??? If it's .040 and it's a standard small block Ford, then your bore is 4.040"

Jeff Chambers · 07-25-2005, 08:09 AM

You'd be a 4.040" bore like 'roddin says. They have a 4.090" gasket, but it's not very popular so its not in stock often. So your next choice is the 4.100" which I'd recommend for the 308. After that, its 4.155" which you'll loose even more compression with if you use. If the Cometics aren't in stock, check Mr. Gasket. They're the Cometics, just re-packaged. BTW: Good choice. Since I started using the Cometics, I haven't had a single head gasket failure. Best thing since sliced bread (or R-blocks)!

07-24-2005, 07:23 PM	#1
leathal injection Registered Member Join Date: Mar 2004 Location: Long Island Posts: 58	buying cometics, need to know bore size?? hey guys, i have a 308, and i want to buy cometic head gaskets. What size bore do i have? cause i know there gonna ask when i call to order them??? thanks alot guys __________________ 1990 Mustang GT Engine- 308 (bored .40 over) Probe Forged pistons (10.5:1), Scat forged crank and rods, w/Main Girdle, AFR 185 heads, GT-40 intake, CSI electric water pump. AC delete kit, No smog pump, Manual rack and pinion steering. Ignition- MSD 6AL, MSD Blaster coil, MSD hellicore wires. Drive Train- Tremic 3550, Alum. Drive shaft, 3:73 gears, Stock carrier and axels. 26X11.5 M/T Et streets. Power adder- 175 shot of laughing gas. Best ET 11.5 @120mph on squeeze, 12.4 @109mph on muscle (on gt40 heads) on the 185 heads ... ??? tba

07-25-2005, 08:09 AM	#3
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Re: buying cometics, need to know bore size?? You'd be a 4.040" bore like 'roddin says. They have a 4.090" gasket, but it's not very popular so its not in stock often. So your next choice is the 4.100" which I'd recommend for the 308. After that, its 4.155" which you'll loose even more compression with if you use. If the Cometics aren't in stock, check Mr. Gasket. They're the Cometics, just re-packaged. BTW: Good choice. Since I started using the Cometics, I haven't had a single head gasket failure. Best thing since sliced bread (or R-blocks)! __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"

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